Delivery-roller for circular-saw mills



(No Model.)

J. A. HAY & J. RALSTON.

DELIVERY ROLLERS FOR'GIRGULARQAW MILLS. No. 273,072. Patented Peb.2'7,1883.

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UNITED STATES PAT NT OFFICE.

JAMES A. HAY AND JOHN RALSTON, OF SLIPPERY ROCK, PENNSYLVANIA.

DELIVERY-ROLLER FOR CIRCULAR-SAW MILLS.

SPECIFICATION forming part of Letters Patent No. 273,072, dated February2'7, 1883.

Application filed June 6, 1882.

(No model.)

To all whom it may concern.-

Be it known that we, JAMES A. HAY and J OHN RALSTON, of Slippery Rock,in the county of Butler and State of Pennsylvania, have invented a newand Improved Delivery-Roller for Circular-Saw Mills, of which thefollowing is a full, clear, and exact description.

This invention consists of an improved arrangement of thedelivery-rollers over which the lumber passes for delivery from the sawafter being separated from the log, the object of which is to enable thelog to be supported a little in advance of the saw as well as in rear ofthe cutting-edge, forsustaining the log against shifting by the thrustof the saw when it enters the end of the log, and also for holding upthe ends of the pieces cut off to prevent any changes of stress on thelog at the moment when the separated pieces are detached, and thusenable the logs to be held more securely, and the lumber to be deliveredbetter than with the common delivery-roller arrangement, as hereinafterfully described.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure l is a plan view of the saw and saw frame of a circular-saw millwith our improved delivery-roller attachment, and Fig. 2 is a sideelevation of the same. i A represents the bed-frame, B the arbor, and Othe saw, of a circular-saw mill for slitting logs or cants to makesiding, flooring, planks, studding, joists, andother forms of marketablelumber.

D and E represent a pair of delivery-roller guides which we propose toemploy for the delivery of the lumber along andaway from .of its properposition on the carriage.

the saw when being separated from the log, which passes to the righthand of the saw on a carriage, (not shown,) while the boards or otherforms cut off from the log pass to the left-hand of the saw over theserollers, which are to support the cut pieces, holding them up, so as toprevent them from sagging and straining on the log with a tendency toturn it out Commonly a single roller is located on the sawframe at orabout the rear edge of the saw, so that the overhang of the log isunsupported when the saw strikes it and until the sawed [piece reachesthe roller, and when the log passes the saw and the piece is entirelyseparated from it the overhanging end of the said piece is unsupported,so that in the first place the log is liable to shift by the stress ofthe saw when it strikes the end of the log, and it is also liable toshift when the piece is detached, or shortly before, by the stress of the piece before the separation, or by the change of stress afterward, ifnot supported evenly with the support by the head-block. WVe thereforepropose to locate roller D a little in advance of the cutting-edge ofthe saw, so that itwill give support to the log on that side of the sawwhere the saw strikes the log, and roller E a little back of thecutting-edgeto support the pieces at the point where they are separatedfrom the log, and thus prevent the shifting of the log in both cases.

We mount the rollers on the head F of a sliding bar, G, fitted betweenguides H, attached to the side of the saw-frame, so that the rollers D Emay be adjusted to the proper height, and we connect the bar G to thecrank I of a rock-shaft, J, by a rod, K, to be shifted by a lever-arm,L, that may be used to press the roller up to the log by hand or othersuitable means, and to shift the rollers down out of the way, whenrequired,as indicated by the dotted lines. 7

Having thus fully described our invention, we claim as new and desire tosecure by Letters Patent-- 1. In a saw-mill, the combination, with acircular saw, of two rollers, D E, arranged on a head, F, placed at oneside of the saw, with the roller D projectingfarther forward than thesaw,and the rollerE between thecutting-edge and the center of thesaw,,as shown and described.

2. .The combination, in a saw-mill, with the slide-bar G,carrying a headhaving rollers for supporting the sawed-off lumber, of the rod K,rock-shaft J, having crank I, and the lever-arm L, all arrangedsubstantially as shown and described.

JAMES ALBIN HAY. JOHN RALSTON.

Witnesses .ANDIE WOLFORD, CURTIS STILLNAG-ON.

